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Finding the Fourth Proportional to 18,916.32, 28,361.92 and 10,597.12

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Solution

The fourth proportional to 18,916.32, 28,361.92 and 10,597.12 is: 15,888.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,916.32 : 28,361.92 = 10,597.12 : x
  2. Step 2: Convert to fraction form
    18,916.32/28,361.92 = 10,597.12/x
  3. Step 3: Cross multiply
    18,916.32x = 28,361.92 × 10,597.12
  4. Step 4: Simplify right side
    18,916.32x = 300,554,669.67
  5. Step 5: Solve for x
    x = 300,554,669.67/18,916.32
  6. Step 6: Final answer
    x = 15,888.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.